If you want to accomplish maintenance tasks for your Derbi Dirt Boy 10 then it is always a good idea to have access to a Workshop Manual to keep just for a reference just in case you want to know ways to strip off a particular part for instance the Wheel and install it again accordingly.
Derbi Dirt Boy 10 Workshop Manuals will give you identifiable diagnostic guidelines with regards to your vehicle so if something is faulty it can help you identify what the problem is and the way to resolve it. After that you can decide if this can be achieved yourself or in the event the job is too big you can still make a booking for your Dirt Boy 10 in with a local car garage.
Derbi Dirt Boy 10 manual